In the current version, it is a composite mixture of the Common Astronomy Software Applications simulation tool (CASA https://casa.nrao.edu/ [1]}) and OSKAR https://github.com/OxfordSKA/OSKAR software package [2]}. CASA is one of the most widely used calibration and imaging software in radio astronomy. It is built principally using the C++ language along with some FORTRAN with an IPython interface that provides the capability of interferometer data viewing, calibration, editing, and imaging. There are in-built tasks for each step of data reduction. It also has inbuilt tasks for the simulation of data. Additionally, several toolkits are available for different applications, including data simulation. The CASA simulator tool provides a large number of functionalities for simulations using different array layouts, frequency and time information, beam patterns, noise, etc. OSKAR is another simulation package that produces interferometric visibilities for aperture arrays. OSKAR is written principally in the C programming language and has GPU acceleration capability, which can be run from both bash and using Python interface. It provides options to simulate the radio sky using source catalogues or fits files, array and array element layout files for aperture arrays like the SKA-Low, along with different beam patterns, noise properties, etc. A combined pipeline is thus capable of generating mock observations with both dish telescopes and aperture arrays.
